Etching machine

Claim 1

IN A SPRAY ETCHER HAVING AN END LOADING STATION AND AN END UNLOADING STATION, THE COMBINATION OF SPRAY CHAMBERS INTERMEDIATE SAID STATIONS AND PROVIDED WITH LIQUID SPRAYING DEVICES THEREIN, SAID SPRAY CHAMBERS COMPRISING ETCHANT SPRAY CHAMBER MEANS IN WHICH PRESSURE-INDUCED SPRAYS OF LIQUID ETCHANT ARE CONFINED AND ADJACENT RINSE CHAMBER MEANS IN WHICH PRESSURE-INDUCED SPRAYS OF A RINSE LIQUID ARE CONFINED, MEANS FOR SUPPORTING PANELS TO BE ETCHED COMPRISING A HORIZONTAL ROLLER TABLE EXTENDING FROM ONE END STATION TO THE OTHER FOR CONVEYING PANELS IN A PATH THROUGH SAID SPRAY CHAMBERS, DRIVE MEANS CONNECTED FOR SIMULTANEOUSLY ROTATING THE ROLLERS OF SAID TABLE, FIRST AND SECOND BOX-SHAPED TRAP MEANS CARRIED RESPECTIVELY AT THE PATH ENTRY POINTS OF SAID ETCHANT SPRAY CHAMBER MEANS AND SAID RINSE CHAMBER MEANS AND THIRD AND FOURTH BOX-SHAPED TRAP MEANS CARRIED RESPECTIVELY AT THE PATH EXIT POINTS OF SAID ETCHANT SPRAY CHAMBER MEANS AND SAID RINSE CHAMBER MEANS, SAID SECOND AND THIRD BOXSHAPED TRAP MEANS CONSISTING OF PORTIONS OF THE SAME LIQUID-BLOCKING TRAP LOCATED AT A POINT IN A DIVISION WALL BETWEEN THE CHAMBERS, AND CONTAINING AN UPPER AND A LOWER ROLL IN ENGAGEMENT WITH THE ENTERING AND EXITING PANELS FOR BLOCKING THE ESCAPE OF LIQUID BEING SPRAYED ON PANELS IN SAID CHAMBERS, AND A PAIR OF DRAIN OPENINGS DISPOSED ONE ON EACH SIDE OF THE ROLLS IN SAID LIQUIDBLOCKING TRAP AND EACH COMMUNICATING WITH THE CHAMBER AT THAT SIDE FOR RETURNING TRAPPED LIQUID THERETO FOR RECIRCULATION.